Vacuum tank



May14,1929. J.ELLBERG Em. 1,112,985

` VACUUM TANK v Filed Aug. 22, 1928 2 Sheets-Sheet l Z4 En 25 L65 M btmdA/w CHUM/m ma @s May 14, 1929. J. ELLBERG ETAL 1,712,985

VCUUM TANK Filed Aug. 22, 1928 2 sheets-Sheet 2 u i 1 @lum/Z306 06m/WAM Patented May 14, i929.

UNITED STATES PATNT OFFICE.

.T ELLBERG, F N'EVV YRK, AND MAGNUE CRNWALL. {l'i BROKLYN,

Application filed August 22, 1928.

This; invention relutes to vucuuintenlis 'for 'feeding` liquid iuel to internel combustion engines; und hee 'lier its primary object to provide in improved Simplified construction ii'or deviceeI ot this cluiructer to render theni more duruble in service, incre etllective in operation und more sensitive in fiction.

More purticulur objects ot the invention will uppeur in thespecilicetion in connection with certain details` of construction referred to in the appended clniine.

lu the drawings which exemplify our in volition in the preilferred embodiment Sonie Whzit siniilur to that eliovvn in our cepend-A ingrapplication 'leriul No. 260,624 which wus Ii led under darte o1' lvlhirch 10, 1928.

Figure 1 is u verticul section oi u vecuuni tuel feed tenir conetructedin accordance 'with the principles oit our invention, perte being,` shown in elevation;

Figure 2 is u eiiniler verticul leection oli' the upper portion ot Figure l, perte beingl ehovvn in elevation;

Figure 3 is un enlarged section on the line 3 oit Figure 1; y

Figure Z1 is an enlarged section on the line fr-4 et Figure 1.

Referring inore particularly to the druiv- .ings, un outer cylindrical 'Well 1 is preterebiy constructed oi gleee to enable the enclosed operatingl parte to `be clearly seen. This cylindrical Well 1 ie `clamped between u cup member 2 end u bese plute 5 by ineune oil' tie rods 11- Wliich extend through suiteble openings, in theiinngee 5 end (i ot the top und bottom ineinbere which ure securedby ineens of nuts 7 threaded to the opposite ends oia tie rods t A transverse partition 8 is suspended troni the oep` 2 by ineens of rode 9, at leest one of seid rods being` provided With e tubular bore 10 lor udinitting air below the partition 8 end thus placing` liquid belov,T seid partition under etinospheric pressure. di-

Suid partition o vides the vucuuin tank into en upper receiving; chamber 11 und u lower delivery chain ber 12. A hermetic Seel nitty be toi-med around the periphery ot partition 8 Within the cylindrical Wall 1 by ineens oli en unnulur pecking 13. Leading to the inlet chamber 11 is un inlet pipe l/liior tuel, en outlet pipe 15 being secured to the under surface oit partition 8` und depending theretroni with its lower end submerged in the Serial No. 301,236.

ie preiferubly formed ut the lower end oi. e

reeiprocetory rod 18. lt will be eeen from en inspection ot the lower portion of Figure l that the discharge pipe 15 is inude of eui'iieient dienieter to provide un annuler eprice tor inid, eri-id annuler Space being in open cen'nnunicution ebove with the inlet chamber 11. The reciproczttory rod 18 is eiidebly supported by :L strep 19 und has its upper end provided with u, conical. vulve 2() which reciproczrtes in e vulve chuinber 21 to und 'troni u vrilve eeut 22 tor controlling' :i port openingi 2) which leeds :from the valve ehunlher 2l. to u vucuuin pipe 24:. An air inlet ehuniber L5 provided with u port open- 2e ie provided with e bell vulve 27 u nich ie normally seated uguinst u vulve sent 22 when the velve rod 18 is in its lower position zie shown in Figure 1. T he vulve seat 2S ie inode et ,suitable eine to permit the vulve 2i' to be engaged by the conical eur 'lucc oji vulve 20 so that Whenever the valve rod 18 ie moved. upwardly to close the vecuuin port 23, the bull vulve 27 'forced troni 'ite eeet to udinit zur to the receiving chamber 11 inte which the inlet pipe .lil hue been discharging tuel under the suction of the vecuun'i in vucuuin pipe 2Ll previous to this ection. 'lhie displacement oiz the ball vulve troni ite seat is shown in Figure 2.

Suitable ineens tor reciprocating the rod 18 nluy be provided es follows. Float 28 is reciproeubiy mounted on the rod 18 und edupted to riee und tell with the upper eurlzi-ee et the liuid contained in chamber 1l. Depending troni the cep 2 :t tired support or guide 29 which is provided With e guide elet 3d Fivotelly mounted ut 31 upon the support 29 ie u lever which as shown beet in Figure 3 ie provided With e power erm coinprieing1 e yoiie 32 und :i bi'iiurcnted work erin comprising branches Which ure provided `-with elots Bft within which reciprocate the oppoeitely presented pins 35 carried by un :uljueteble coller 3G ou the upper end of reciprocutory rod 18. A spring rod 37 reciprocutee et one end in the croespiece 38 of yoke lever erin 32, the other end of Suid springv rod being` provided with u bifureated etrep 39 which is pivotully connected by :L

, the spring' rod 37 between the 'c1oss-piece l' rel yoke B2 andthe strap end 39 ot vthe lever in raised position as shown in Figure 1 arm 32, is a compression spring which imparts a'tendency to retain the lecr arm 32 or in lowered position asl shown in Figure 2. A discharge pipe 46 leading trom the lower chamber 12 has its intake end arranged at a higher level than the discharge opening 1G in the pipe 15 and thus maintains a fluid seal at the bottom of pipe 1:3.

l With the parts in their relative po:`ti-fins shown in Figure 1, a relatively low level of the fluid in receiving chamberll has peimitted the float 28 to tall, thus causing tue rod. 18 to drop into its lower positi n. This action opens the vacuum port 23 at the saaie time that the outlet 1G into the 'deliv n chamber 12 is closed. This movement pir mits the ball valve 27 to be. presi-fed te seatand thus prevents the adir' :on of air tl'iroughl the air inletjchamber The rcsulting partial vacuum in chamber 11 produces an inflow of fuel through the pipe As the fluid level rises in chamber 11, the .float 28 elevatcs the pivot 4() ot spri rod `V 37 until the impression spring 45 hec-emes suitably disposed to force the lever arm 232 downwardly. This movement produces a `rapid upward displacement of the rod 1S to close the vacuum port 23 while at the same timeopening the discharge outlet 1G and forcing the ball-valve 27 from its seat. This operation breaks-the partial vacuum in chamber 11 to interrupt the inllow of tuel inlet, fuel discharge, air inletV and vacuum openings, thek combination with a. reciprocatory rodffor controlling said openings, o't a pivotallyV mounted lever movably connected lto said i'eeipi'oeatoiy rod, a float reciprocable on and relatively to said rod, a link conv. neeted to and actuated by said float, means for constraining` the movement et said link, and a yieldable connection between said link Hand-said lever, said yieldable connection comprising' a spring rod Vmovably connected toJ saidv link and movably engaging said lever,` and a spring mounted on said spring- 'rod'fand' transmitting pressure between said link and lever for imparting a bias to said lever tending` to retain said reciprocaiory rod in either of its extreme positions.

2. The combination with a tank provided with Huid-receiving and lluid-dischargiug chambers provided with a. communicating passage, said iluid-receiving` chamber being provided with a vacuum-control passaai, of a reeiprocatory alve rod adapted lo ailernately close said passages, a lever pivolall y mounted intermediately of iti: ends. one arm of said lever being movably connected to said reeiprocatory rod, a float rcciprocably mounted on said reeiprocatory rod` said float being' reciprocable with and relatively to said reciprocable rod, a lixed guide, a link pivotally mounted on said lloat and movably .Ging said lixed guide, and an articulaiing yieidable connection bciwccn said link and the other arm of said lever, and a spring` interposed between .said abutnicnts on Isaid spring rod.

1n a vacuum tank, the combination with a reciprocatory rod for controlling the i'iow of fluid between the receiving and lluiddischarging chambers as well as a connnunieating passage to a vacuum duct. of a` float reciprocably mounted on said rcciprmfalory rod, an air-inlet valve arranged to be oper- :zcd by said rcciprmatory rod, a lever pivotaliy mounted ou an axis outside oit said rcciprocatory rod and having` one arm thereof movably connected lo said reciprocalory rod, the other arm of said lever being prcsentcd away from said reciprocalory rod, a fixed guide, a link artieulatcly connected lo :iid float and movably engaging said guide, and a` yieldable connection extending between said link and said other arm of said lever.'

4. The combination with a tank provided with a fluid-receiving chamber having a valve seat Vthrough which fluid is passed and a. vacuum-control valve-seat coaxial with the i'irst-mentmied valve-seat, a reci procatory rod provided at opposite ends with valves adapted to seat on said valve-seats alternately, a pivotally mounted lever having one arm movably connected to said reciprocatory rod and the other arm thereof provided with a. spring abutment, a float reciprocahle with and relatively to said reciprocablc rod, a link pivotally mounted at one end on said `float, a spring rod pivotally connected to the other end et said link and having a spring abutment adjacent to that end, the other end of said spring rod being reciproeably mounted in the first-mentioned abutment on said other arm of said lever, and a spring` interposed between said abutments on said spring rod.

5. rl`he combination with a tank provided with a fluid-receiving chamber, of a reciprocatory rod adapted by its movement in one direction to control a fluid outlet leading tweeen :trein said chamber and by its movement in the opposite direction to control an exhaust outlet leading to a vaeuuni chamber, a pivotally-Ineunted lever having one `afin movalily Connected to said. leoipi'oeatofy rod and the other aini thereof provided with a spring al)ntlnent a float l'eeiprocably mounted on said ii'eeipioeatory i'od and reeiproeable rel atively to said reeiproeatory rod, a link piv otally connected to Said float, a Spring; i'od pivotally connected at one end. to .said link and having its other end Sldably engaging laid alnitnientD and a compression api'ingg intevpoeed between Said abutment and 'the pivoted end olf said Spying rod.

(3. lhe combination with a tank piovided with a llilid-ifeoeiviniI eliambei', of a 1'eeipi'oeatoify rod adapted to control the adnlied Sion and dieel'iaige olf :linid,'a lever pivotally inonnted on a lined aizif.: and having' one aun tlieveof inovally ooilneeted to f-aid reciproeato'ry roda the otl er: anni. of said lever being; piovidet'l with a spring); abntinentt7 a :lloat ieeipioealily mounted on and relatively to Said i'eeipi'ooatmy rod, a link pivotally mounted at one end et said lloat and having;- ite other end eo'i'istl'ained to move in a piedetermined patin a spring rod pivotally Connected at one end to said link and, having; a Spring abutment adjacent to that end, the other.' end ot said Spring rod being; 1eei'proably lnonni'yed 'in the lireamentioned algiutnient, and a Spi-ing' intel-posed between eaid almtlnei'ite and on said epiino Tod.

7. The combination with a tank provided with lluidaeeeving and Huid-discharging chambers and. having a valve-seat through which 'fluid is passed from one of said ehambers to the otlleifa .aid il'lnid-reeeiyl'ig Chainliei being provided with a vaclnnn-oontrol valve-seat coaxial with the first-mentioned valve-seat, a reeipifoeatoi'y iod provided at opposite ende with valves adapted to seat on Said Valve-Seats alternately, an ai1-nlet valve amanged to be opened by said recploeat'oly rod on its movement toward Said vaeninteonti'ol valve-Seat, a lined support, a level.' pivotally mounted on said fixed snp- Aport and having; one aun thereof movably connected to said ieeipioeatoi'y rod, the other anni ot said level.' being; provided with a Spring abutment, a ilioat i-eeipifoeably mounted on Seid i'eepioeatoly rod, said lloat 'being i'caziploeable with and relatively to said i'eeipi'oealile wd, a lined guide, a link pivotzlly mounted at one end on said 'float and having' its; otheif end niovably engaging maid fixed guide, a spi-ing rod pivotally eenneeted at one end to said linie and l'laving' a api'iny; alnitinwt adjacent to that end, the other end el? said spring lrod being-T reeip- Tori-ably mounted in the liistmientioned abntnient on said other ai'ln oil' said lever, and a Spring interposed between Said abntl'nente en @aid aiming rod.

JGHN RLLBERG. MAGNUS CRONVALL. 

